Journal of the Chemical Society, Dalton Transactions p. 3489 - 3496 (1993)
Update date:2022-08-29
Topics:
Dixon, Donovan A.
Sadler, Novelette P.
Dasgupta, Tara P.
The kinetics of oxidation of L-ascorbic acid (H2A) by potassium chromate has been studied under aerobic and anaerobic conditions over the range 0.002 t -3, 3.50 -3 (NaClO4) and 0.05 -3.The experimental rate constants obtained in the presence of oxygen are about 10 times smaller than those obtained in its absence.A mechanism involving the formation of a chromium(VI)-ascorbate-oxygen intermediate is discussed in an attempt to explain this.The disappearance of chromium(VI) under aerobic conditions follows the rate law (i) where kf = (k1Ka1
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(1971)
